Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
dang mam » dang nam, dang mau, dang mat
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
duc gia » quoc gia
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
sac ky » sai ky
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) OR (cac ky)) ((tang ma) or (dang mam)) hoi. hieu va cam duc gia thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) ((tang ma) OR (dang mam)) hoi. hieu va cam duc gia thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) ((tang ma) or (dang mam)) hoi. hieu va cam duc gia thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) ((tang ma) or (dang mam)) hoi. hieu va cam duc gia thanh tai cua tre*.